program test

!! adding this statement narrowed the issue down to ddot being considered real(4)
implicit none

integer, parameter :: dp = kind(1.0d0)

!! The following 2 lines were added for the calls to the BLAS routines.
!! This fixed the issue.
real(dp), external :: ddot
real, external :: sdot

real, dimension(3) :: a,b
real(dp), dimension(3) :: d,e

integer :: i

do i = 1,3
    a(i) = 1.0*i
    b(i) = 3.5*i
    d(i) = 1.0d0*i
    e(i) = 3.5d0*i
end do

write (*,200) "sdot real(4) = ", sdot(2,a(1:2),1,b(1:2),1)  ! should work and return 49.0
write (*,200) "ddot real(4) = ", ddot(3,a,1,b,1)  ! should not work

write (*,200) "sdot real(8) = ", sdot(3,d,1,e,1)  ! should not work
write (*,200) "ddot real(8) = ", ddot(3,d,1,e,1)  ! should work and return 49.0

200 format(a,f5.2)

end program test
